be动词的一般现在时形式

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be动词的一般现在时形式：am, is ,are

如何使用他们一般由句子的主语决定 be 动词用法口诀：

我（I）用am, 你（you）用are， is连着他，她，它。

单数名词用is,复数主语都用are 用am, is, are填空：

1：My mother _____ a teacher. 2: Your sister _____ ten years old.

3: His students _____ all in the classroom. 4: You and I _____ good friends. 5: I _____ from Guangdong. 6: Lucy _____ an English girl. 7: She ____ in Class Two this year. 第三人称单数（三单）：除I 和you 以外的单数 8: You ____ our Chinese teacher this term.

含有be动词句子的句型转换



句型变换口诀：

变疑问，往前提，句末问号莫丢弃， 变否定，更容易，be后not莫忘记。 疑问否定任你变，句首大写莫迟疑。 含有be动词的句型转换练习：

1：I am late today.

否定句：__________________________________ 一般疑问句：________________________________ 肯定回答：_________________ 否定回答：_________________

2:Tom is in Class Two.

否定句：__________________________________ 一般疑问句：________________________________ 肯定回答：_________________ 否定回答：_________________

3:We are good students.

否定句：__________________________________ 一般疑问句：________________________________ 肯定回答：_________________ 否定回答：_________________



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4: I am drawing a picture.

否定句：__________________________________ 一般疑问句：________________________________ 肯定回答：_________________ 否定回答：_________________

用适当的be动词填空

1. I ______a boy. ______ you a boy? No, I _____ not. 2. The girl _______ Jack’s sister.

3. _______ your brother in the classroom? 4. Who _______ I?

5. The jeans _______ on the desk. 6. There _______ a girl in the room. 7. My sister's name _______ Nancy.

8. There _______ some apples on the tree.

9. There _______ a boy, two girls, three men and ten women in the park. 10. The dog______ tall and fat.



I am = I’m you are = you’re he is = he’s she is = she’s it is = it’s we are = we’re you are = you’re they are = they’re



◆主谓缩写原则

即be动词与作主语的名词或代词缩写。去掉am, is, are的第一个字母，用“ ’”代替。 如：am → ’m, are → ’re, is → ’s



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I’m not. you aren’t. he isn’t.

No, she isn’t.

it isn’t. we aren’t. you aren’t. they aren’t.



◆否定缩写原则

即be动词与not可以缩写。

not中的“o”用“ ’”代替.如：is not → isn’t, are not→ aren’t ◇特别提醒： am与not不可缩写。 不能同时使用两个缩写形式。 写出下列句子中划线部分的缩写形式。

1. I am Helen. _______ 2. Those are not my pictures. _______ 3. Who are they? _______ 4. That is a clever boy. _______ 5. Her name is Kim. _______

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